Makefile up to date for opencv libs

makefile

@@ -1,7 +1,7 @@
 all: ppg
-	g++ ppg.o -o ppg.exe
+	g++ ppg.o -o ppg.exe -L/usr/lib/x86_64-linux-gnu/ -lopencv_stitching -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_dnn_objdetect -lopencv_dnn_superres -lopencv_dpm -lopencv_highgui -lopencv_face -lopencv_freetype -lopencv_fuzzy -lopencv_hdf -lopencv_hfs -lopencv_img_hash -lopencv_line_descriptor -lopencv_quality -lopencv_reg -lopencv_rgbd -lopencv_saliency -lopencv_shape -lopencv_stereo -lopencv_structured_light -lopencv_phase_unwrapping -lopencv_superres -lopencv_optflow -lopencv_surface_matching -lopencv_tracking -lopencv_datasets -lopencv_text -lopencv_dnn -lopencv_plot -lopencv_ml -lopencv_videostab -lopencv_videoio -lopencv_viz -lopencv_ximgproc -lopencv_video -lopencv_xobjdetect -lopencv_objdetect -lopencv_calib3d -lopencv_imgcodecs -lopencv_features2d -lopencv_flann -lopencv_xphoto -lopencv_photo -lopencv_imgproc -lopencv_core
 ppg: ppg.cpp
-	g++ -c ppg.cpp
+	g++ -c ppg.cpp -I/usr/include/opencv4/opencv -I/usr/include/opencv4
 clean:
 	rm *.o
 	rm *.exe

ppg.cpp

@@ -1,7 +1,11 @@
-#include <iostream>
-using namespace std;
+#include "opencv2/opencv.hpp"
+#include "opencv2/videoio.hpp"
+#include "opencv2/highgui.hpp"
 
-int main() {
-  cout << "Hello World!";
+#include <iostream>
+
+int main() 
+{
+  std::cout << "Hello World!" << std::endl;
   return 0;
 }